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103116 (1999 XD181)
Classification: Main-belt Asteroid          SPK-ID: 2103116
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2224337655466636 4.9331e-08  
a 2.584274716071052 1.464e-08 au
q 2.009444759768332 1.2969e-07 au
i 13.58900381459361 5.4276e-06 deg
node 31.49811084466182 2.0965e-05 deg
peri 298.16448629965 2.3283e-05 deg
M 92.34077454339401 1.313e-05 deg
tp 2458811.277930924463
(2019-Nov-23.77793092)
5.3324e-05 TDB
period 1517.422239092723
4.15
1.2894e-05
3.53e-08
d
yr
n .2372444470138032 2.0159e-09 deg/d
Q 3.15910467237377 1.7896e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1300  
   data-arc span      7765 days (21.26 yr)  
   first obs. used      1999-10-12  
   last obs. used      2021-01-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46529  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:45:11  

Additional Information
 Earth MOID = 1.03842 au 
 Jupiter MOID = 2.36508 au 
 T_jup = 3.349 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.88   n/a E2021B55  
diameter diameter 3.953 km 0.219 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.163   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

103116 (1999 XD181)          Discovered 1999-Dec-12 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1902-Feb-22 16:45 < 00:01 Europ 0.0187335178676893 0.0187163046290636 0.0187507319302113 6.76973241790501 6.7697323340979 2415803.197667242 0.402013801050485 880.308983426281 42.8335273568783 -12.8886573951717 14913.5177516193 T 25 CATAB v2.0f-lin.ifort 2021-Apr-13 15:45:14 2021-Apr-13 15:45

Alternate Designations
 1999 XD181 = 2002 GS21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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